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A device and method for measuring the strength of hydrogel particles

A technique for measuring the strength of hydrogel particles, applied in the direction of testing material strength by applying stable tension/pressure, fluid pressure measurement by changing ohmic resistance, etc.

Active Publication Date: 2021-05-18
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The technical problem to be solved by the present invention is to provide a device and method for measuring the strength of hydrogel particles, which solves the problem of measuring the strength of hydrogel particles

Method used

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  • A device and method for measuring the strength of hydrogel particles
  • A device and method for measuring the strength of hydrogel particles
  • A device and method for measuring the strength of hydrogel particles

Examples

Experimental program
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Embodiment 1

[0031] Embodiment 1 of the present invention: In order to accurately measure the strength of hydrogel particles, this embodiment provides a device for measuring the strength of hydrogel particles, which includes a container for containing hydrogel particles containing samples to be tested and a particle strength measuring instrument. The two sides of the container containing the hydrogel particles are provided with two longitudinal scale lines for determining the deformation of the hydrogel particles under pressure; the back of the container containing the hydrogel particles is provided with drainage holes for draining water. Gel particles are squeezed out of water; there is no gap between the plexiglass press plate and the container containing the hydrogel particles and can move up and down.

[0032] When using the hydrogel particle strength measuring device provided in this embodiment, select different contents of sodium alginate (SA)+3%CaCl 2 (SA content is 1.0,1.5,2.0,2.5g...

Embodiment 2

[0034] Example 2 of the present invention: On the basis of Example 1, hydrogel particles prepared by selecting different contents of polyvinyl alcohol (PVA) + saturated boric acid (PVA content is 11, 12, 13, 14, 15g / 100mL) As a test object (each test has two groups of parallel samples), its assay method is as follows:

[0035] Pack 300 hydrogel granules tightly in the hydrogel granule container, and place the plexiglass platen on it; read the initial height h of the stacked spheres from the vertical scale lines on both sides 0 ;Put the device on the particle strength tester, turn the handwheel slowly and evenly so that the pressure part presses the plexiglass platen and moves down slowly to the initial height h 0 Stop at 90% of the deformation, that is, at 10% of the deformation, and record the reading F of the particle strength tester at this time 1 ; Continue to press down to the initial height h 0 Stop at 80% of the deformation at 20%, and record the reading F of the part...

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Abstract

The invention discloses a device and method for measuring the strength of hydrogel particles. In the device for measuring the strength of hydrogel particles, a pressure sensor is arranged below the bottom surface of a container for containing hydrogel particles, and the container for containing hydrogel particles contains a plexiglass pressure plate , the two sides of the container containing hydrogel particles are provided with longitudinal scale lines, the sides of the container containing hydrogel particles are provided with drainage holes, the plexiglass pressing plate is arranged on the sample to be tested for hydrogel particles, the organic glass pressing plate and the hydrogel particle There is no gap between the sides of the container and can move up and down. The hydrogel particle strength measuring device combined with the particle strength measuring instrument solves the problem of hydrogel particle strength measurement, realizes the determination of the strength of hydrogel particles of different materials and different particle sizes, and can measure the strength of composite materials with different ratios. The strength of the hydrogel particles is optimized, the test method is simple, and the operation is convenient.

Description

technical field [0001] The invention belongs to the technical field of measuring the strength of hydrogel particles, and in particular relates to a device and method for measuring the strength of hydrogel particles. Background technique [0002] Hydrogel particles are a kind of soft and wet materials that contain a large amount of water in the cross-linked polymer network. Hydrogel particles are formed by water-soluble or hydrophilic polymers through certain chemical cross-linking or physical cross-linking. At present, materials for preparing hydrogel particles include natural organic carrier materials such as cellulose and its derivatives, chitosan, agar, alginate, etc.; synthetic polymer materials such as polyvinyl alcohol, polyurethane, polyacrylamide, and photocurable resins. etc.; cross-linking agents such as glutaraldehyde, calcium chloride, calcium nitrate, 1,6-hexanediamine solution, boric acid, etc. Common hydrogel particles such as polyvinyl alcohol (PVA) + satur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/08G01L9/02
CPCG01L9/02G01N3/08
Inventor 姜应和周俊胡晓玲王怡帆刘洋艾德军
Owner WUHAN UNIV OF TECH